Permutation-lock.



N. VENTRIOE.

' PERMUTATION LOOK.

APPLICATION FILED 1mm, 1914.

1,098,068. w Patented May 26,1914.

2 SHEETS-SHEET 1.

N. VENTRICE.

PERMUTATION LOCK.

APPLICATION FILED JAILG, 1914.

Patented May 26, 1914,

2 SHEETS-SHEET 2 hlil I6| I 2O quainted with the specific manner of mak- NICOLA VENTRIGE, OF COLLINSVILLE, CALIFORNIA. i

PERMUTATION-LOCK.

loosens.

Specification of Letters Patent.

Patented May 26, 1914.

Application filed January 6, 1914. Serial No. 810,668.

production of a lock wherein'it will be impossible for unauthorized persons to unlock the same without knowing the manner of operation thereof.

Another object of 'the invention is to provide a simple and efiicient lock wherein after vit is once looked, the key may be rotated in either direction in the lock by an unauthorized person but the bolt of the lock can not be withdrawn unless the operator is acing the key operative.

\Vith these and other objects in view, the invention includes the features of construction and arrangement and construction of parts hereinafter described and more particularly pointed out in the claims,.it being understood that I do not intend to limit myself with regards to the details of the differ- .ent parts of my invention.

I have illustrated my invention in the ac-.

companying drawings, in which:

Figure 1 is a rear elevation of the lock in its open position; F 1g. 2 1s a similar vlew of the look after one closing revolution of the key; Fig. 3 is a similar View of the lock in its closed position or after two closing revolutions of the key; F igA: is a front elevation with the face plate removed showing the completion of the first opening operation Fig. 5 is a similar View showing the comple.-

tion of the second opening operation; Fig. 6 is a similar view of the completion of the third opening operation; Fig. 7 is a similar view showing the completion of the fourth opening and final. opening operation; Fig.

8 shows a section on the line 8-8 of Fig.

5 looking in the direction of the arrow; and

Fig. 9 shows a longitudinal section of the key; Fig. li'sa top plan view of the bolt.

In the drawings, the ordinal 1 indicates the face-plate of the lock, 2 the bolt, 3 the key hole, 4 the key whose particular construction is more particularly hereinafter described. The bolt 2 is slidably secured to the face plate 1 by guides and 6 which may be reniovably secured to the face plate as by to bear against the-upper edge of the boltand a cam shapedlateral extension adapted to be raised by the key when in certain positions. In the top of the bolt is a notch 16 adapted to receive the tooth 1 1 of the tumbler member 13 when the parts take the position shown in Fig. 2. The bolt is of a shape substantially as that shown in-Fi'g. 10. Inserted in the cutaway portion of the bolt is aplate .17 having a notch 18 therein adapt-ed to engage a pin 19 whenthe parts are in the position shown in Fig. 4. This pin 19 (Fig. 8) projects inwardly from a spring plate 20 secured to the outside of the face plate adjoining the key hole and between the key ho-le and the side of the lock from \vhichthe bolt shoots. face plate are cut away at 21 and, 22 and are of a shape to correspond with the key and into which fit and project projections 21 and 2-2 on the spring .plate 20 for a purpose hereinafter described. In the top bf the inserted plate 17 is a'notch 23 whlchis adaptedto engage a square pin 24: on a vertically moving member 25 shdabl-y secured. to the face plate and having a spring 7 26 exerting a downward pressure thereon. Fig. 3 shows these parts in engagement.

The key 4: 1s pecullarly constructed as sh'ownin F 1g.- 9 wherein 27 is a hollow barrel thereofhaving pivoted therein a lever 28 with bent ends 29 and 30. -A spring- 31 is provided to normally maintain the end 29 withdrawn into the key and the end extended therefrom.

The operation of my lock is as follows: In the open position the parts are as shown in Fig. 1. Then the key is inserted and during one revolution of it to close the lock, it engages the projection 9 of theboltnnd thereby moves the bolt into the part ally locked position shown in Fig. 2. In thls position, the tooth 1 1 of the spring tumbler member 13 falls into the notch 16 in thebolt and prevents the spring 10 from' causing the withdrawal of the bolt. During the second closing revolution of the key, it engages Parts of the v the projection of the bolt and thereby moves' the bolt to its completely. locked posi-- tion, Fig. 3. While the key is causing the bolt to move, it engages and lifts the cam;

shaped extension of the tumbler 13 which,

being integral with the tooth 14, lifts it out falls, due to the pressure of the spring 26 thereon, until its square pin 24: engages the notch. 23 and prevents any retraction of the bolt. This fall allows a portion of this member 25 to projectbelow the bolt as will be seen by comparing its positions in Figs.

2 and S. W-hen the parts are completely locked as in 8, the key may be turned in either direction without any effect upon the parts as is illustrated by the circle in dotted. lines which is to show the reach of the key. Now, to unlock the bolt it is first necessary to place the key in the position shown in Fig. 4. Then the pin 30 extending from the barrel of the key is depressed, which causes the extension of the end 29 of the lever, as shown in Fig. 4. As this end 29 emerges from the key, it raises the member 25 against the pressure of the spring 26 and unseats the squarepin 24 from its notch 23. This leaves the spring 10 free to retract the bolt until its movement is stopped by the notch 18, engaging the pin 19 of the springplate 20 (see Figs. t and 10). The key is next given a three quarter turn until it is over the openings 21 and 22 and the projections of the spring plate therein (Fig. 5). The key is then given a pull toward the operator when a portion of the bit enters the openings 21 and 22and forces the mo jections 21 and 22 therefrom which causes the spring plate 20 to bend outwardly from i the face plate (Fig. 8) thereby disengaging the pin 19 from the notch 18 and allowing the spring again to operate to retract the boltuntil the notch 16 in, the top of the bolt engages the tooth 14 of the tumbler member 13 (Fig, 5). The key is then given an unlocking turn (Fig. 6) wherein it. engages and lifts the cam-shaped extensi0n15 of the spring tumbler member, which disen gages the tooth let from the notch 16,- thereby'enabling the bolt tobe unshot by the key moving the bolt through the projection 8 thereon.

I claim as my 1nvention:

gaged by said key consecutively in its sev- "eral locking revolutions, means for partially retracting said bolt,inieans in said key for means to operate, and means for locking said bolt when partially; retracted, said key operating on one ofsaid projections to complete the retractionof the bolt.

2. 'Tncombination in a lock, a bolt, a key,

projections on said bolt arranged to be engaged by saidkey consecutively 1n its several locking revolutions, spring retracting means for said bolt, automatic arresting means in the path of'said bolt, means in said key for releasing said arresting means,

Stud key operating on one of said pro ections.

to complete the retraction of the bolt.

3. In combination in a look, a bolt, a key,

lugs on said bolt arranged to be engaged by said key consecutively in its several locking I revolutions, a spring exertlng a retracting pressure upon said bolt, projections in the path of said bolt, notches in said bolt auto matically engaged bysaid projections,

means in said key for disengaging said proections from said notches, said key operat-v ing on one of said lugs to complete the re traction of the bolt..

4. In combination in a lock, a bolt,-a'key,'

lugs on said bolt arranged to be engaged by sa d keyconsecut-ively in its several locking revolutions, a spring exerting a retracting pressure upon said bolt, a spring plate on the exterior face of the look, a pin carried thereby projecting into the path of said bolt, tumblers, projections carried thereby 5.. In combination in a look, a bolt, a key having a bit," lugs on said bolt arranged to be engaged by said key consecutively in its several lockingorevolutions, spring retracting means for said bolt, a plurality of automatic arresting means in the path of said bolt, a pivoted lever longitudinal of said key having one projection'through thebit of said-key, and another through the barrel thereof, the manipulation of said lever operating to release one of said arresting means when the key'is-in-a certain posit-ion and the bit of the keyoperating to release another of said arresting meanswhen the key is in a certain 'positionand "pulled toward the operator, said 'key operating on one of said I I r lugs to complete the retraction of the bolt. 1. In combination in a lock, bolt, 'a key,- projectionson said bolt arranged to be en- In testimony whereof, 1 afiix tiny signature in. presence of two witnesses.

' NIGULA VENTRTCE. Witnesses: I

'* Josnrnr Anromua.

Em r. EMMINeTon. 

